What is the efficiency of briquettes compared to wood?
When you have a wood stove, fireplace or all-burner uses, you naturally want to know which fuel provides the most heat at the lowest cost. In this article, we compare the efficiency of briquettes compared to wood. We analyse combustion efficiency, environmental impact, price per kilowatt-hour (kWh) and ease of use.
What are briquettes?
Briquettes are pressed blocks made from compressed sawdust, wood chips or other biomass. They are often used as an alternative to traditional firewood. There are different types of briquettes, including:
- Wood briquettes: made from compressed untreated wood waste.
- Lignite briquettes: derived from lignite, less environmentally friendly.
- Pini Kay briquettes: high-quality wood briquettes with high energy value.
Briquettes are popular for their consistent combustion and high energy density. But how do they perform compared to traditional firewood?
What is efficiency in combustion?
Efficiency on combustion means how much usable heat is released per unit of fuel. The higher the efficiency, the more efficiently the fuel is converted into heat. This is often expressed as a percentage or in kWh per kilogram.
Energy value per kilogram
The average energy value of different fuels:
- Wood (air-dried): ± 4 kWh/kg
- Wood briquettes: ± 5 kWh/kg
- Pini Kay briquettes: up to 5.3 kWh/kg
- Wet logs: sometimes only 2-3 kWh/kg due to moisture loss
Conclusion: on average, briquettes provide more energy per kilogram than ordinary firewood.
Advantages of briquettes over wood
1. Higher efficiency and energy density
Briquettes have a higher energy density, which means you need less volume to generate the same amount of heat as with wood. Thanks to their low moisture content (usually below 10%), they burn more efficiently than air-dried wood (15-20% moisture).
2. Reduced smoke and particulate emissions
Since briquettes are drier and burn more homogeneously, they produce less smoke and particulate matter than traditional firewood. This makes them a more environmentally friendly choice - especially in urban areas where air quality is important.
3. Constant combustion and longer burn time
Pini Kay briquettes, for example, have a very controlled burn and can glow for up to three hours without refuelling. Ordinary wood requires more frequent refilling and has a less predictable combustion pattern.
4. Storage and ease of use
- Less storage space needed: Due to their compact shape, briquettes take up less space.
- Clean in use: No bark or insects as with natural wood.
- Longer shelf life: No risk of mould formation as with wet stored wood.
Disadvantages of briquettes compared to wood
1. Higher purchase price per kilogram
Briquettes are usually more expensive per kilo than loose firewood.
However, because of their higher efficiency, the price per kilowatt-hour generated can still be more advantageous.
2. Less atmospheric experience (subjective)
Some people find that real firewood gives more atmosphere because of the smell, crackling and flames. Briquettes do provide heat but sometimes lack this 'authentic' experience.
Cost comparison: Briquettes vs Wood (2024)
| Fuel type | Cost per kg (€) | Energy content (kWh/kg) | Cost per kWh (€) |
|---|---|---|---|
| Air-dried firewood | €0,25 - €0,35 | ±4 kWh/kg | €0.06 - €0.09/kWh |
| Pini Kay Briquettes | €0,40 - €0,50 | ±5.3 kWh/kg | €0.08 - €0.09/kWh |
| Lignite briquettes* | €0,30 - €0,45 | ±6 kWh/kg | €0.05 - €0.075/kWh |
| *Less sustainable alternative due to carbon emissions. | |||
Costs may vary depending on supplier and pack size.
Sustainability: which choice is better for the environment?
Sustainability plays an increasing role in fuel choices. In this respect, wood briquettes from residual wood or FSC-certified material high. They use waste streams and reduce waste.
- Natural firewood: Sustainable provided it comes from responsibly managed forests (FSC/PEFC).
- Pini Kay briquettes: Often made from recycled sawdust with no additives - very durable.
- Lignite briquettes: Fossil origin - not sustainable.
Milieu Centraal recommends using only dry wood or certified briquettes for cleaner combustion.
Coherence with type of stove or fireplace installation
Some modern stoves are optimised to use specific fuels such as Pini Kay or round briquettes. Always consult your appliance's manual to determine which fuel is best suited to your installation for maximum efficiency as well as safety.
Tips for optimum firing with briquettes or logs
- Always ensure sufficient draft in the chimney.
- Place kindling on top of the pile ('top-down' method).
- Make sure the moisture content is below 20% (use a moisture meter).
- Mix different types of fuel if necessary for optimum performance.
- Have chimney swept annually for safety and efficiency.
Interim conclusion: Which yields more - briquettes or wood?
Looking at energy content per kilogram as well as practical advantages such as storage and cleaner combustion, high-quality wood briquettes such as Pini Kay have a significantly higher yield than ordinary firewood. The higher purchase price is often compensated by longer burning times and less consumption per session.
So: Which is better - Briquette or Wood?
| Category | Briquette (Pini Kay) | Air-dried log |
|---|---|---|
| Energy value (kWh/kg) | 5 - 5.3 kWh/kg | ±4 kWh/kg* |
| Beauty & ambience | Less crackling fire | Classic fire view |
| Sustainability | Very high if FSC-certified | Medium to high |
| Cost/kWh | Slightly higher but more efficient | Lower but more consumption |
| Easy to store | Very compact | Less efficient in terms of space |
| *Depending on moisture content |
Frequently asked questions on the efficiency of briquettes versus wood (FAQ)
Which is more economical: briquette or wood?
More economical in terms of energy output per kilogram are quality wood briquettes such as Pini Kay. They provide more heat with less volume than traditional firewood.
Do briquettes reduce smoke?
Sure! Due to their low moisture content, they produce significantly less smoke and particulate matter than wet or poorly dried firewood.
Can all types of briquettes be used in my stove?
No. Always check the manual of your appliance. Some appliances are not suitable for lignite briquettes because of higher temperatures or residue left after combustion.
Are briquettes more expensive than regular firewood?
Purchase price per kilo is usually higher with briquettes, but due to their higher efficiency, the price per kilowatt-hour generated can be similar or even lower than with firewood.
